Huztl MS660

[davhul]

Mine with the 54mm both picked up power and lost vibration as it broke in. Around tank number 10 it was at its best. I did one with and without any cleaning up on the ports. Both are still running. The built with "as delivered" parts saw is in the hands of a guy who sells firewood. Still runs strong. The "cleaned up" build isn't much stronger than the as delivered version but it has a more crisp feel to it.. throttle response idle etc. All improved.

My 56mm version gets run frequently and this will be the second firewood season for it. As for power... its got more than both stock saws it was compared too. Also noticeably more than the 54mm saws.

Not being a Stihl guy...I started mine at 12500. Now the 54mm and the 56mm sit at 13300-13500 depending on temp & humidity. (56mm i keep closer to 13300) The 56MM Version does vibrate more and still needs a carb tweak as the weather changes..just a little more finicky than the 54's

In my mind they all are in the ball park power wise with the saws in that displacement class. In those cookie cut comparisons a bar/chain difference will often sway the results so my total bar / LGX combo sharpened my way easily could have impacted my impromptu comparisons. Bottom line is for the $400 dollar price point there is nothing you can buy new even close. Pretty amazing that it gets compared favorably to a stock version when you think about it.

If I was to do this again I think I would take a tweaked 54mm version over the 56 simply because they are easier to live with once the novelty is done, the measuring sticks put away, and day in day out I'm looking at a pile of work with no one but mother nature watching.

How much compression did the 54mm have last time you checked? Mine was 150 un- started. I'll check it tomorrow at 1.5hrs on the meter. I Have a hour meter mounted.


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[MustangMike]

I got a few questions:

Is everyone running caber rings??? It is likely a good idea, some cheap insurance.

I went on line to the Huztl site, and I saw the 660, but not a 660 big bore. Was the P&C for the big bore purchased in addition?

I also saw they gave a discount on 6 or more orders, don't know if they also discount the shipping, but I'll bet I could find a few other who want one of these. I may take advantage of that!

Also, are most of you guys checking the squish and deleting the base gasket when possible? I know this can make quite a difference on some saws, and If I get a saw this big, I would want a strong runner (other wise, I would use a smaller saw).

 

[davhul]

I installed caber rings. I may have went with NWP if they were In Stock. Tomorrow I'm pulling the muffler and taking a look at things.And advancing the timing 8°. I plan on checking the squish when I do a port.
But I want to see how it runs stock With a basic timing mod.
Friday I might be going to a near by saw mill to tune my ported 460 and let them put some hours on the AM saw bucking.
Ultra 32:1 90oct E-0
13,300 rpm, cj6 plug.


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[tbohn]

I got a few questions:

Is everyone running caber rings??? It is likely a good idea, some cheap insurance.

I went on line to the Huztl site, and I saw the 660, but not a 660 big bore. Was the P&C for the big bore purchased in addition?

I also saw they gave a discount on 6 or more orders, don't know if they also discount the shipping, but I'll bet I could find a few other who want one of these. I may take advantage of that!

Also, are most of you guys checking the squish and deleting the base gasket when possible? I know this can make quite a difference on some saws, and If I get a saw this big, I would want a strong runner (other wise, I would use a smaller saw).

I am going with the huztl rings. If they wear out I will replace them.
I ordered the big bore kit along with the complete parts kit. It was packed in the same box.
I think the cost with shipping for six is $1,105 so there is discount for shipping along with reduced cost per unit. I am thinking of get 6 more but I really only want 1 or two more. I sure the extras could be sold on ebay or craigslist but I don't want to hassle with warranties and returns.

 

[davhul]

One other thing I noticed. When you put the control lever on choke it works as it should. Closes choke and puts it on part throttle.
When you go up one notch it doesn't stay on part throttle.
I tried a new oem control lever still no. Will order a trigger tomorrow and see if that will fix it.


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[jackjcc]

So it won't stay on high idle?


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[davhul]

No. I'll see if a new trigger will solve it. It's like the trigger arm that touches the control arm to hold it open is short by a little.
If you do it slow it will hold barely. But then if you push it to far it won't hold it. When the trigger comes in I'll interrogate it more.


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[tbohn]

I am going with the huztl rings. If they wear out I will replace them.
I ordered the big bore kit along with the complete parts kit. It was packed in the same box.
I think the cost with shipping for six is $1,105 so there is discount for shipping along with reduced cost per unit. I am thinking of get 6 more but I really only want 1 or two more. I sure the extras could be sold on ebay or craigslist but I don't want to hassle with warranties and returns.

I just finished putting the two case halves together. I took the crank out of the freezer and stuck the case halves in the oven. I turned the oven to 250f, turned it off and stuck the case in there for about 10 minutes. The clutch side slipped in pretty easy the clutch side went in far enough the get the 6 case bolts in. I slowly tightened the bolts as rotated around the bolts. I also turned the crank periodically to get the seals to behave. The crank was also wet from coming out of the freezer so the seals did not invert. Everything worked great and I did not have to apply very much pressure to the bolts.

 

[blsnelling]

The crank was also wet from coming out of the freezer...

That's one of the main reasons I don't put anything in the freezer, also that I've found it's not needed. Heat is all you need.

 

[tbohn]

23 mil squish on the 56mm with no gasket. Checked it three times. Is that enough?

 

[tbohn]

23 mil squish on the 56mm with no gasket. Checked it three times. Is that enough?

I have about 13 mil of freeport.

 

[davhul]

23 mil squish on the 56mm with no gasket. Checked it three times. Is that enough?

From what I read on 660's is .020 is preferred for power as compression.
.023 should be safe. Do you plan on a pressure/vacc test To see how it's sealed?


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[tbohn]

23 mil squish on the 56mm with no gasket. Checked it three times. Is that enough?

 

[davhul]

Do you have .023 squish?Or you checking in mm?


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[MustangMike]

23 mil squish on the 56mm with no gasket. Checked it three times. Is that enough?

That should be fine. I have a 440 with 19/1000, no problems.

 

[tbohn]

From what I read on 660's is .020 is preferred for power as compression.
.023 should be safe. Do you plan on a pressure/vacc test To see how it's sealed?


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Yes. I will check for leaks. Thanks for the response!

 

[tbohn]

Do you have .023 squish?Or you checking in mm?


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.023

 

[davhul]

That's what I was thinking you meant. It's good.


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[tbohn]

.023

Battery is dead on my micrometer. I verified the micrometer with a feeler gauge.

 

[davhul]

I contacted huztl:
Dear sir,
Thanks for your business.
We are having the National Holiday for 7 days, including the logistics company. Thank you, Lynn


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